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authorChris Robinson <[email protected]>2017-03-10 04:35:32 -0800
committerChris Robinson <[email protected]>2017-03-10 04:35:32 -0800
commit583d431947be540a33843d68feb5f1456671c298 (patch)
tree0f85220f58dd446d9732cb3a70bf7917585619c8 /docs/3D7.1.txt
parentd9b1995e95ac3d838566500f1e5496ae71d832e0 (diff)
Implement NFC filters for Ambisonic rendering
NFC filters currently only work when rendering to ambisonic buffers, which includes HQ rendering and ambisonic output. There are two new config options: 'decoder/nfc' (default on) enables or disables use of NFC filters globally, and 'decoder/nfc-ref-delay' (default 0) specifies the reference delay parameter for NFC-HOA rendering with ambisonic output (a value of 0 disables NFC). Currently, NFC filters rely on having an appropriate value set for AL_METERS_PER_UNIT to get the correct scaling. HQ rendering uses the averaged speaker distances as a control/reference, and currently doesn't correct for individual speaker distances (if the speakers are all equidistant, this is fine, otherwise per-speaker correction should be done as well).
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